docs(c2): Add note about ESP32-C2 support to documentation (#9629)

README.md

@@ -60,6 +60,10 @@ Here are the ESP32 series supported by the Arduino-ESP32 project:
 | ESP32-C6 | No | Yes | [ESP32-C6](https://www.espressif.com/sites/default/files/documentation/esp32-c6_datasheet_en.pdf) |
 | ESP32-H2 | No | Yes | [ESP32-H2](https://www.espressif.com/sites/default/files/documentation/esp32-h2_datasheet_en.pdf) |
 
+> [!NOTE]
+> ESP32-C2 is also supported by Arduino-ESP32 but requires rebuilding the static libraries. This is not trivial and requires a good understanding of the ESP-IDF
+> build system. For more information, see the [Lib Builder documentation](https://docs.espressif.com/projects/arduino-esp32/en/latest/lib_builder.html).
+
 For more details visit the [supported chips](https://docs.espressif.com/projects/arduino-esp32/en/latest/getting_started.html#supported-soc-s) documentation page.
 
 ### Decoding exceptions

docs/en/getting_started.rst

@@ -45,6 +45,11 @@ ESP32-C6 No Yes `ESP32-C6`_
 ESP32-H2 No Yes `ESP32-H2`_
 ======== ====== =========== ===================================
 
+.. note::
+ ESP32-C2 is also supported by Arduino-ESP32 but requires rebuilding the static libraries.
+ This is not trivial and requires a good understanding of the ESP-IDF build system.
+ For more information, see the `Lib Builder documentation <lib_builder.html>`_.
+
 See `Boards <boards/boards.html>`_ for more details about ESP32 development boards.
 
 Arduino Core Reference